The NNLO QCD corrections to DIS event shape distributions and their mean values are computed for the first time, reducing scale uncertainties and improving the description of H1 and ZEUS data.
The One-loop QCD Corrections for gamma^* to q qbar gg
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abstract
We compute the one-loop QCD amplitudes for the decay of an off-shell vector boson with vector couplings into a quark-antiquark pair accompanied by two gluons keeping, for the first time, all orders in the number of colours. Together with previous work this completes the calculation of the necessary one-loop amplitudes needed for the calculation of the next-to-leading order O(alpha_s^3) corrections to four jet production in electron-positron annihilation, the production of a gauge boson accompanied by two jets in hadron-hadron collisions and three jet production in deep inelastic scattering.
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2019 1verdicts
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Second-order QCD corrections to event shape distributions in deep inelastic scattering
The NNLO QCD corrections to DIS event shape distributions and their mean values are computed for the first time, reducing scale uncertainties and improving the description of H1 and ZEUS data.